Improvement in looms



J'. C. DUCKWORTH.

LOOM.

Patented J"a.n.11,1876.

N PETERS, PHOTO-LITHOGRAPHER, WASHINGTONv u 0.

UNITED' STATES PATENT DFFIGE JOHN C. DUCKWORTH, OF NEW YORK, N. Y.,ASSIGNOR TO E. S. HIGGINS &'OO.,OF SAME PLACE.

-|MPROVEMENT IN LOOMS- Specification forming part of Letters Patent No.172,097, dated January 11, 1876; application tiled June 11, 1875.

scription of the same, reference being had to the accompanying drawingwhich forms part of this specification.

This invention, although applicable to shuttle-looms of difl'erentdescriptions, is more especially advantageous with looms havingchangeable shuttle-boxes. The invention comprises an independent shLittle-raceway, in combination with a vibrating comb.and lay, forbeating up the filling.

The invention consists in a combination, for

' giving a double beat, of a crank and toggle motion with a combinedcomb and lay made independent of the shuttle-boxes and raceway. I

The invention also consists in-a cam-andlever motion, in combinationwith the comb and lay, said motion lifting the comb, when back, to enterthe warp, behind the fillingyarn, after which it is carried directlyforward, thereby taking the comb through the warp without unnecessaryfriction.

In the accompanying drawing, Figure 1 represents a plan of 'a loom inpart, having my invention applied, and Fig. 2 a vertical sec tion of thesame, indirection of the length of the Warp.

A is the breast-beam, B the raceway, and G the reed, all of which are ormay be stationary, as also the shuttle-boxes D 1), with provision, itdesired,-for substituting other shuttle-boxes, when changeableshuttle-boxes are used. In all cases, however, the raceway andshuttle-boxes are independent of the lay E. This lay has combined withand mounted on it a comb, F, which beats in common with the lay, andreceives the warp b between its dents, but is distinct from the reed.Said comb and lay are vibrated backward and forward to separate the warpb and beat up the filling 0, by means of devices which give a doublebeat each forward stroke or single revolution of the driving-shaft G,the advantage of which double beat in driving home the filling is wellunderstood. The means here represented for this purpose consist ofcranks H, connecting-rods I operated by said cranks, and toggle bars orlevers J K, receiving an up-and-down motion from said rods, and attachedat their outer ends, respectively, to the la at d, and a fixed fulcrum,6.

By this arrangement or combination of devices, not only is the lay withits attached comb vibrated backward and forward, as required, but thesame has a doublebeat when working up the'filling by the reverse flexingand straightening ot' the toggle-bars twice during each revolution ofthe driving-cranks, and the comb and lay work in proximity with thebreast-beam. The lay and comb have also an up-avd-down movement by meansof cams L on the shaft G, and arranged to act on bell-cranks or leversM, to which the lay is jointed below, said levers being held up toworking contact with the cams by one or more springs f, and the cams andlevers operating to lower the comb when moving toward the shuttle-race,and to lift it when, or shortly before, and while, working forward oraway from the race. a

By the use of the combined comb and lay, in combination with anindependent raceway and shuttle-boxes, there is a great advantage in theapplication of the same to looms having changeable shuttle-bo xes,including looms for weaving carpets, or other looms for workingdifferent-colored yarns, inasmuch as by my arrangement or combinationthe lay has much less to carry than when the shuttle-boxes and racewayare attached to it.

There is also another advantage, and which applies to all or differentkinds of looms, and that is, by reasonot' the independent or stationaryrelation of the raceway and shuttleboXes, the shuttle may be completelythrown in the wide part of the shed, and entirely independent of theposition of the lay. Thus it may -,be thrown while the lay is workingback. If from any cause the shuttle should stop on the raceway it willnot break the warp.

The comb F, too, which not only vibrates between the breast-beam andraceway, but also has a rising and falling motion, as described, toclear the shuttle-thread when approaching the raceway, and to risebehind it when or before vibrating forward again, or away from theraceway, is much easier on the warp than is a reed carried by the lay.Thus the comb Edoes not chafe the warp to the same extent, inasmuch asit does not leave and enter all. the warp at onc but only enters theupper part of the yarn after it has passed through the lower part; nordoes the comb in its vibration backward and forward require to move .tothe same extent as an ordinary reed that 1s, it need not move as farback, consequently its wear upon the yarn is very much less. Thinnerdents likewise may be used in the reed G, inasmuch as all that said reedhas to do is to separate the yarn, the comb and lay doing the beatingup.

When the raceway and shuttle-boxes move with the lay, the filling isslackened by the coming forward of the lay, thereby making a slackselvage. This effect cannot take place in a loom which is constructed tooperate as I have here described, as clearly shown by full and dottedlines, for the filling-yarn 0 in Fig. 1 of the drawing; but the fillingis always kept tight when beaten up, and 'a tight selvage isconsequently insured.

I claim 1. The combination, with the comb F and lay E, which areindependent of the shuttleboxes and raceway, of one or more cranks, H

7 on a revolving shaft, G, one or more rods, 1

and the toggle bars or levers J K, essentially as and for the purposeherein set forth.

2. The combination, with the independent lay and comb, of the cams L andlevers M, substantially as and for the purpose specified.

JOHN G. DUOKWORTH. Witnesses:

W.-O. WRITER,- JNo. 0. GOODRICH.

